From: "Michel Dänzer" <michel@daenzer.net>
To: "Christian König" <deathsimple@vodafone.de>
Cc: dri-devel@lists.freedesktop.org
Subject: Re: [PATCH] drm/radeon: Don't try to enable write-combining without PAT
Date: Thu, 05 Feb 2015 10:08:47 +0900 [thread overview]
Message-ID: <54D2C29F.6010803@daenzer.net> (raw)
In-Reply-To: <54D1EB2D.7030601@vodafone.de>
On 04.02.2015 18:49, Christian König wrote:
> Am 04.02.2015 um 02:19 schrieb Michel Dänzer:
>> From: Michel Dänzer <michel.daenzer@amd.com>
>>
>> Doing so can cause things to become slow.
>>
>> Print a warning at compile time and an informative message at runtime in
>> that case.
>>
>> Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=88758
>> Cc: stable@vger.kernel.org
>> Signed-off-by: Michel Dänzer <michel.daenzer@amd.com>
>
> Interesting I wonder what the rational behind this is. I mean
> CONFIG_X86_PAT will obviously affect write combining, but why does it
> slow down things if we request something that the kernel isn't
> configured for?
Yeah, I'm not sure exactly what happens in that case, but I don't care
too much, since PAT is clearly desirable anyway.
> Anyway, patch is Reviewed-by: Christian König <christian.koenig@amd.com>
Thanks!
--
Earthling Michel Dänzer | http://www.amd.com
Libre software enthusiast | Mesa and X developer
_______________________________________________
dri-devel mailing list
dri-devel@lists.freedesktop.org
http://lists.freedesktop.org/mailman/listinfo/dri-devel
prev parent reply other threads:[~2015-02-05 1:08 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-02-04 1:19 [PATCH] drm/radeon: Don't try to enable write-combining without PAT Michel Dänzer
2015-02-04 9:49 ` Christian König
2015-02-04 22:37 ` Alex Deucher
2015-02-05 1:08 ` Michel Dänzer [this message]
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=54D2C29F.6010803@daenzer.net \
--to=michel@daenzer.net \
--cc=deathsimple@vodafone.de \
--cc=dri-devel@lists.freedesktop.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox